PK_ACP_LEN
i2c_rd(sd, PK_ACP_0HEAD, buf, PK_ACP_LEN);
i2c_rd(sd, PK_ACP_0HEAD, buffer, PK_ACP_LEN);
v4l2_info(sd, "Packet: %*ph\n", PK_ACP_LEN, buffer);
v4l2_info(sd, "InfoFrame: %*ph\n", PK_ACP_LEN, buffer);